Y 0.08Sr 0.92Fe xTi 1-xO 3-δ perovskite for solid oxide fuel cell anodes

Jong Seol Yoon, Mi Young Yoon, Chan Kwak, Hee Jung Park, Sang Mok Lee, Kyu Hyoung Lee, Hae Jin Hwang

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume177
Issue number2
DOIs
Publication statusPublished - 2012 Feb 15

Bibliographical note

Funding Information:
This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea. Part of this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No.2010-0010744).

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Y <sub>0.08</sub>Sr <sub>0.92</sub>Fe <sub>x</sub>Ti <sub>1-x</sub>O <sub>3-δ</sub> perovskite for solid oxide fuel cell anodes'. Together they form a unique fingerprint.

Cite this